Hornaday Vmax vs Zombie Max Cutaway

Have posted these before, but while putting away some 7.62x39 cutaways, noticed that there is a difference between the 123gr VMax and Zombie Max. Different powders, one being stick and the other ball. Also the jacket is twice as thick on the Zombie. Wolfgang

Odd, since zombies tend to be rather mushy; one would think a thinner jacket would be preferred.

Do you have a cutaway of the SST projectile to compare?
I have heard that the zombie max is actually the SST with green tip instead of the usual red.